31123313016611 has 2 divisors, whose sum is σ = 31123313016612. Its totient is φ = 31123313016610.

The previous prime is 31123313016599. The next prime is 31123313016619. The reversal of 31123313016611 is 11661031332113.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31123313016611 is a prime.

It is a super-2 number, since 2×31123313016611² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31123313016619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15561656508305 + 15561656508306.

It is an arithmetic number, because the mean of its divisors is an integer number (15561656508306).

Almost surely, 2^{31123313016611} is an apocalyptic number.

31123313016611 is a deficient number, since it is larger than the sum of its proper divisors (1).

31123313016611 is an equidigital number, since it uses as much as digits as its factorization.

31123313016611 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 32.

Adding to 31123313016611 its reverse (11661031332113), we get a palindrome (42784344348724).

The spelling of 31123313016611 in words is "thirty-one trillion, one hundred twenty-three billion, three hundred thirteen million, sixteen thousand, six hundred eleven".